Labor doesn't create anything.

Sure, they put things together, but labor never creates anything.
If it was just a world of "labor", there would be nothing.

If it was just a world of engineers, it would be whole bunch of fine tuned nothing.

It takes the entrepreneur to see a need, and an idea of how to fill it.
And then that entrepreneur getting a bunch of people together to turn that idea into reality.

And then the oligarchs buy up the company and the bean counters get in charge, because they can make each thing run better (so they think) and squeeze every last cent out of it.

But, Labor doesn't create anything, and so is entitled to nothing.